private void renewSessionThread()
{
while (!ClassDisposing)
{
if ((DateTime.Now - LastTimeSessionRenewed).TotalMinutes > SessionRenewalPeriodMins ||
(DateTime.Now - LastTimeOPCServerFoundAlive).TotalSeconds > 60)
{
Console.WriteLine("Renewing Session");
try
{
OPCSession.Close();
OPCSession.Dispose();
}
catch { }
InitializeOPCUAClient();
LastTimeSessionRenewed = DateTime.Now;
}
Thread.Sleep(2000);
}
}
public void InitializeOPCUAClient()
{
//Console.WriteLine("Step 1 - Create application configuration and certificate.");
var config = new ApplicationConfiguration()
{
ApplicationName = MyApplicationName,
ApplicationUri = Utils.Format(@"urn:{0}:" + MyApplicationName + "", ServerAddress),
ApplicationType = ApplicationType.Client,
SecurityConfiguration = new SecurityConfiguration
{
ApplicationCertificate = new CertificateIdentifier {
StoreType = @"Directory", StorePath = @"%CommonApplicationData%\OPC Foundation\CertificateStores\MachineDefault", SubjectName = Utils.Format(@"CN={0}, DC={1}", MyApplicationName, ServerAddress)
},
TrustedIssuerCertificates = new CertificateTrustList {
StoreType = @"Directory", StorePath = @"%CommonApplicationData%\OPC Foundation\CertificateStores\UA Certificate Authorities"
},
TrustedPeerCertificates = new CertificateTrustList {
StoreType = @"Directory", StorePath = @"%CommonApplicationData%\OPC Foundation\CertificateStores\UA Applications"
},
RejectedCertificateStore = new CertificateTrustList {
StoreType = @"Directory", StorePath = @"%CommonApplicationData%\OPC Foundation\CertificateStores\RejectedCertificates"
},
AutoAcceptUntrustedCertificates = true,
AddAppCertToTrustedStore = true
},
TransportConfigurations = new TransportConfigurationCollection(),
TransportQuotas = new TransportQuotas {
OperationTimeout = 15000
},
ClientConfiguration = new ClientConfiguration {
DefaultSessionTimeout = 60000
},
TraceConfiguration = new TraceConfiguration()
};
config.Validate(ApplicationType.Client).GetAwaiter().GetResult();
if (config.SecurityConfiguration.AutoAcceptUntrustedCertificates)
{
config.CertificateValidator.CertificateValidation += (s, e) => { e.Accept = (e.Error.StatusCode == StatusCodes.BadCertificateUntrusted); };
}
var application = new ApplicationInstance
{
ApplicationName = MyApplicationName,
ApplicationType = ApplicationType.Client,
ApplicationConfiguration = config
};
application.CheckApplicationInstanceCertificate(false, 2048).GetAwaiter().GetResult();
//string serverAddress = Dns.GetHostName();
string serverAddress = ServerAddress;;
var selectedEndpoint = CoreClientUtils.SelectEndpoint("opc.tcp://" + serverAddress + ":" + ServerPortNumber + "", useSecurity: SecurityEnabled, operationTimeout: 15000);
// Console.WriteLine($"Step 2 - Create a session with your server: {selectedEndpoint.EndpointUrl} ");
OPCSession = Session.Create(config, new ConfiguredEndpoint(null, selectedEndpoint, EndpointConfiguration.Create(config)), false, "", 60000, null, null).GetAwaiter().GetResult();
{
//Console.WriteLine("Step 4 - Create a subscription. Set a faster publishing interval if you wish.");
var subscription = new Subscription(OPCSession.DefaultSubscription)
{
PublishingInterval = 1000
};
//Console.WriteLine("Step 5 - Add a list of items you wish to monitor to the subscription.");
var list = new List <MonitoredItem> {
};
//list.Add(new MonitoredItem(subscription.DefaultItem) { DisplayName = "M0404.CPU945.iBatchOutput", StartNodeId = "ns=2;s=M0404.CPU945.iBatchOutput" });
list.Add(new MonitoredItem(subscription.DefaultItem)
{
DisplayName = "ServerStatusCurrentTime", StartNodeId = "i=2258"
});
foreach (KeyValuePair <string, TagClass> td in TagList)
{
list.Add(new MonitoredItem(subscription.DefaultItem)
{
DisplayName = td.Value.DisplayName, StartNodeId = "ns=" + OPCNameSpace + ";s=" + td.Value.NodeID + ""
});
}
list.ForEach(i => i.Notification += OnTagValueChange);
subscription.AddItems(list);
//Console.WriteLine("Step 6 - Add the subscription to the session.");
OPCSession.AddSubscription(subscription);
subscription.Create();
}
}
